High explosive



UNITED STAT S PATENT OFFICE.

FRANS eUs'rAr ABELIBROBERG, or nMroruUM, PENNSYLVANIA, Assienon or oNE-HALr-ro DAVID LUNDY wrt'nnrcx, OFDOVER, NEW JERSEY.

HIGH sxPLosws.

SPECIFICATION forming part of Letters Patent No. 542,724, July 16, 1895.

Application filed September 11,1394. Serial No. 522,760. (No specimens.)

To all whom it may concern:

Be it known that I, FRANS GUSTAF ABEL BROBERG, a subject of the King of fiweden and Norway, (but having declared my intention of becoming a citizen of the United States,) residing at Emporium, in the county of Cameron and State of Pennsylvania, have invented certain new and useful Improvements in High- Power Explosives; and I do hereby declare the following to be a. full, clear, and exactdescrip.

tion of the invention, such as will enable othare skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in high-power explosives; and it consists essentially in the product formed by mixing together nitro-naphthalenes with nitro -glycerin, to which nitrocellulose may or may not .be added, and in then adding carbon when required and an oxidizing-agent.

The nitro-naphthalenes' are non-volatile at the ordinary temperature and assist in the rapid gelatinization of 'the nitro-celluose in the mixture containing nitro-glyoerin and rendering the explosive formed by the mix ture with the carbon and the oxidizing agent permanently plastic, whereas most of the solvents for nitro-cellulose'now in use are volatile and evaporate from the mixture, leaving the powder dry aifd hard. It will also be noted that the herein-described nonvolatile agent while assisting in the gelatini- 'zation .of the nitro cellulose will tend to make the explosive safer. Y

To the ingredients above noted sulfur may 'or may not be added, but in low grades of dynamite manufactured in accordance with my dinvention sulfur should preferably be use 'lhe ziitro-naphthalenes used in the hereindescribed explosive should preferably be prepared by treating naphthaleneflwith nitric acid, about 40 Baume', in or about equal parts by weight ofacid and naphthalene. The product of the reaction will ordinarily be a mixtureloi the mono, di, and tri nitro-naphthalenes, (chiefly mono, and probably very little tri nitro-naphthalene.) The crude nitronaphthalenes thus prepared and'having been thoroughlyv freed from adhearing acid are added to the nitro-glyeerin or to the mixture of nitro glycerin and nitro -cellulose and thoroughly mixed therein,.and then the mix ture may be used with asimple absorbent, as

in ordinary dynamite; onto it may be added carbon and an oxidizing agent, or an oxidizlug agent only, and also sulfur may or may not be added;

Thefollowing mixtures are suggested as illustrating the invention:

First. Nitro-naphthalenes, eight per cent; nitroglycerin,- twenty per cent.; nitro-cellulose, one per cent; nitrate of soda, sixty-four per cent; sulfur, seven per cent.

Second. Nitro-naphthalenes, two per cent; nitroglycerin, fifty eight per cent; wood pulp, fifteen per cent; nitrate of soda, twenty five per cent. I

Third. Nitro-naphthalenes, 2.5 per cent.; nitroglycerin, forty-five per cent.; nitro-cel lulose, 1.5 per cent; wood pulp, seven per cent.;;nitrate of soda,-forty-four per cent.

Fourth. Nitro-naphthalen'es,3.75 per cent; nitro-glycerin, thirty-two per cent.; nitrocellulose, 1.25 per cent.;- wood pulp, four per cent-.; nitrate of soda, tiftydhree per .cent-.; sulfur, six per cent.

The proportions of the ingredients may be varied widely, however, dependent upon'the required degree of strength of the explosive.

Having thus described my invention, what Iclaim, and desire to secure by Letters Patent of the .United States,-is

1. Ahiigh-power explosive consisting essentially of nitro-glycerin, nitro naphthalenes, wood pulp, nitrate of soda, and'sulfur.

2. A high-power explosive consisting essentially of nitroglycerin, nitro-cellulose, nitronaphthalenes, wood pulp,nitrate of soda, and. 

